I originally wanted to get the Asus rampage 2 extreme but I don't think it will fit properly in my case with the 1 inch overhang, it will block my rear cable routing holes on the 1200.. Unless someone can show me a picture of one fitting perfect that one is ruled out.

I will only be using 1 video card (9800gtx) on this motherboard. I will also be using a PCI sound card (X-Fi xtreme gamer). My power supply is a PC Power & Cooling Silencer 750w.
My heatsink is a Zalman 9500... I think it will fit fine on either motherboard, any known issues with the fit?
It will be going in an Antec 1200 case, so cooling should be sufficient for a decent overclock. I want to get at least 3.5 ghz out of it if I can stay stable and cool. I also would like to push my ram quite a bit too.

Also, I have an IDE harddrive (yes, I know...) so IDE cable usability matters.

I'm stuck on what to choose... price doesn't matter to me. You guys know more about the reliability of these products and all that jazz, so help me pick the best option, thanks. I'm open to different RAM suggestions also, should I go with higher than 1366mhz?

(problem with rampage seen here, it will block this hole and just make a cable routing mess in my case)